Cita APA (7th ed.)

Adler, B. (1967). Letters to the Air Force on UFOs (1a. ed.). Dell Book.

Cita Chicago (17th ed.)

Adler, Bill. Letters to the Air Force on UFOs. 1a. ed. Nueva York: Dell Book, 1967.

Cita MLA (9th ed.)

Adler, Bill. Letters to the Air Force on UFOs. 1a. ed. Dell Book, 1967.